MIN_FULL_INFO_OPTLEN_SIZE
MIN_FULL_INFO_OPTLEN_SIZE);
if (len < MIN_FULL_INFO_OPTLEN_SIZE)
if (copy_from_user(mfi, optval, MIN_FULL_INFO_OPTLEN_SIZE))
return len - MIN_FULL_INFO_OPTLEN_SIZE;
copylen += MIN_FULL_INFO_OPTLEN_SIZE;